The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 1982
Filed:
Mar. 31, 1980
Thomas P Robinson, Plano, TX (US);
Baxter Travenol Laboratories, Inc., Deerfield, IL (US);
Abstract
An intravenous assembly includes a needle extending through a hub and a catheter or cannula secured at its proximal end to the hub. The cannula includes a side port near the distal end thereof in fluid communication with an annular flashback chamber formed between the cannula and needle to provide visual indication of venous entry of the cannula. In another embodiment, a longitudinal slot in the internal wall of the cannula defines the cannula flashback chamber. In accordance with the preferred construction, the needle is hollow, and a plug is secured thereto defining another flashback chamber to provide a separate indication of venous entry of the needle.